主讲人简介：James Gain is an Associate Professor in the Department of Computer  Science at the University of Cape Town and a member of its High-Performance  Computing Laboratory. He obtained his PhD entitled Enhancing Spatial Deformation  for Virtual Sculpting in 2000 from the University of Cambridge. His research  interests cover primarily geometric and procedural modelling. He has also worked  in the application of high performance computing and visualization to  computational chemistry, geomatics and radio astronomy. James Gain has served  two terms as President of Afrigraph, the African Computer Graphics  Association

内容摘要：The challenge in terrain synthesis for virtual environments is to  provide a combination of precise user control over landscape form, with  interactive response and visually realistic results. This talk covers a system  that builds on parallel pixel-based texture synthesis to enable interactive  creation of an output terrain from a database of heightfield exemplars. The  system also provide modelers with control over height and surrounding slope by  means of constraint points and curves; a paint-by-numbers interface for  specifying the local character of terrain; and coherence controls that allow  localization of changes to the synthesized terrain. Together these contributions  provide a level of realism that, based on user experiments, is indistinguishable  from real source terrains; user control sufficient for precise placement of a  variety of landforms, such as cliffs, ravines and mesas; and synthesis times of  165ms for a 1024^2 terrain grid.

讲座语言：英语